Thanks Lumos! However, do you mind if I ask for one more detail? Can you add the maximum coefficient that you can get for every purple stat? E.g. I got a dragon ring with 19% crit. Is it the maximum coefficient for crit stat that I can get? Or can I get a higher stat (e.g. a 20% crit Drag Ring) ? A prompt response is highly appreciated. Thank you so much and best regards.

This is an interesting request, I have been wondering this same question for a couple months. The percentages are random with the same stat and it doesn't make sense. If you don't care, just rebirth the original gear if the new fused piece has a better stat and awaken it again. You lose gold, but gain the better stat percentage.